T-Mobile Wi-Fi 11:40 AM session.masteringchemistry.com Self Assessment 13.5-Enha

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T-Mobile Wi-Fi 11:40 AM session.masteringchemistry.com Self Assessment 13.5-Enhance... MasteringChemistry Constants | Periodic Table Part A What is the molarity of a solution containing 10.3 g Ca(NO3)2 in 196 mL of solution? 0.320 M 2.02 x 103 M 0.053 M 52.6 M Submit Request Answen Incorrect; Try Again; 4 attempts remaining; no points deducted You divided the mass of the solute by the volume of the solution in liters. However, molarity is the moles of solute divided by the volume of the solution in liters. molarity (M) -meo's solation liters solution You may want to review (Pages 455 456)

Explanation / Answer

mass of Ca(NO3)2 = 10.3 grams

molar mass of Ca(NO3)2 = 164.09 gram/mole

number of moles of Ca(NO3)2 = mass/molar mass = 10.3/164.09 = 0.0628 moles

volume = 196 ml = 0.196L

Molarity = number of moles/volume inL

Molarity = 0.0628/0.196 =0.320M

Molarity of Ca(NO3)2 = 0.320M

The answer is A.

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